In many cases as you are experiencing, the smaller projects require access to more liquidity in proportion to the total project than larger projects because of the types of vendors most readily available to work with.The two most challenging time intervals for draw construction is the initial work if there's an upfront payment before a draw knowing you may also be placing an order for windows at this stage which could have a long lead time and towards the end when kitchens, appliances and finish materials are all purchased in a short time interval.

The alternative would be some kind of rolling mtm with notice and a set increase at certain intervals.  

For the vast majority who are measuring their investible capitol in the tens of thousands, while balancing a FT career, a family, life in general, yes it is rare skills and talents to find, analyze and execute on profitable investments at any kind of regularized interval.

Depending on the lender, generally there are options from 6 months or a year to 5 years in one year intervals.

I’ve also tried the BiggerPockets rent estimator, but the confidence interval was low.

But your STR business needs to look like a business you started to make a profit.FYI, I would not worry one iota if I had a rental and in year 1 property is STR because average rental is 7 days but in year 2 property is now a LTR be because average rental interval is 9 days.But if it looked like you created a STR "business" to lose a bunch of money and then stop, I'd be a little worried.

If you're getting someone who helps you get the big deductions and protects you from bungling the deductions, you'll come out way ahead.You probably know this, but to make STRs work great for tax saving, you want your average rental interval to be 7 days or less, you want to clearly and cleanly materially participate in the first year or two so deductions easily flow onto your return, you maybe want to have a cost segregation study done to frontload a bunch of depreciation onto your return, AND you want to not screw up by running afoul of the Section 280A or 183 tax laws.

**Regular Reconciliation**: Schedule regular intervals, such as monthly or quarterly, to reconcile expenses against your budget.

So my number 1 question or DD item if considering them as a service would be security and what intervals do they get eyes on the property?

If it were me I'd also incorporate things like professional cleaning at certain intervals to elevate roomate tensions.