Basically they limit anything likely to increase the usage on the septic.I think I would start by investing the limitations on your current septic system of if there is a nearby sewer that you can tie into.Depending on the constraint on the septic system, maybe an increased leach field or a ATU can address the limits of your current septic system.Aerobic Treatment Units (ATUs) are similar to standard septic systems in that they use natural processes to treat wastewater.

I'd have preventative treatments with a licensed vendor consistently, as often as it takes to mitigate the issue regardless of cost.

That means more of your cash stays in your business, not the IRS’s pocket.For many buyers in this market the ability to offset income and reinvest tax savings is a major advantage — and it strengthens your underwriting.Since STRs have strong appeal (friends & family groups, weekend escapes, high-end amenities) the sooner you position it as a business, the better your financial outcome.Your Step-By-Step Playbook for Cost SegregationHere’s a practical checklist to make cost segregation work for you in an STR:Buy/underwrite with tax strategy in mind: When you evaluate a property, include cost segregation as part of your operating model (not just nightly rate and occupancy).Engage a cost segregation specialist: You’ll want a qualified provider who understands STRs (they’ll allocate assets into proper shorter lives, document everything).Structure operations for “business” treatment: Track participation (guest communication, property maintenance, marketing) to lean into non-passive income treatment.Conduct the study early: Ideally in the year you take service (purchase or major renovation) so you front‐load benefits.Keep detailed records: Invoices, improvement costs, design/furnishing upgrades, hours spent managing.

Short answer:  it is baked into the business model.Long answer:It seems you may be overly concerned on the transitory nature of apartment renters versus single family renters. 

As far as cost, check the natural gas vs electric charges in your area. 

Regarding amenities, focusing on affordability is smart, but even small touches like well-maintained landscaping and curb appeal, modern or fresh paint colors, energy-efficient LED lighting, updated cabinet hardware, ceiling fans, good window treatments, and ample storage solutions all stand out and can help fill units faster and improve tenant satisfaction.

The building currently uses natural gas for heating and hot water.

People come for the lake, the bike trails and nature of course. 

I'm not just talking about underwriters here, but every single role on our team.I believe that underwriting requires a certain skill set and mindset, often attracting individuals with an analytical and detail-oriented nature.

A reasonable modification refers to a physical change made to a rental unit or common area that allows a person with a disability to fully use and enjoy the premises.Examples of Reasonable Modifications:Installing a ramp or grab bars in a bathroom.Lowering countertops, peepholes, or light switches for wheelchair access.Widening doorways or removing carpet for mobility devices.Adding visual doorbells or smoke alarms for tenants who are hearing-impaired.Landlord Responsibility:The landlord must allow the modification if it’s reasonable and necessary.For federally funded housing (like HUD or Tax Credit properties), the landlord is usually responsible for the cost of the modification.For private or market-rate housing, the landlord may require the tenant to pay for the modification and restore the unit to its original condition upon move-out (if the change affects future marketability).The landlord can ask for plans and proof that the work will be done safely and professionally.Tenant Responsibility:The tenant is responsible for paying for and arranging the modification (unless the property receives federal assistance).The tenant must obtain the landlord’s approval before work begins.The tenant may be asked to restore the unit when vacating, depending on state or local law.Best Practices for LandlordsRespond to all accommodation or modification requests in writing and in a timely manner.Keep a Reasonable Accommodation/Modification Request Log for compliance records.Train leasing staff and maintenance teams on Fair Housing requirements.Post a notice or add a clause in your lease about Fair Housing rights for transparency.Final ThoughtsReasonable accommodations and modifications are not “special treatment” — they are legal rights designed to ensure equal access to housing.