It took us a few months to start using them effectively but the most important thing we learned from our experience is to first have a system that works, and then train them on that system. 

It comes from adding the right capacity in the right places—especially downtown, where the spillover effect is strongest.Film exposure builds familiarity.Hotels increase capacity.Museums and events extend stays.Downtown businesses feel the lift.This isn’t about slogans or reinvention.

If it is because you are buying your rate down, that is effectively pre-paid interest. 

If that number is more than the value of the house at present there will be no bids (usually sometimes someone may buy it above the value for whatever reason) and the bank will effectively take the house back.

Most of the major PM softwares will allow this.You didn't state how many doors you have, but most PM softwares require 20+ doors to be cost-effective.

Most of the online DIY cost seg companies provide the option to purchase audit protection, so the cost of a $600 DIY cost seg + audit protection would be much more cost effective than a $4,500 cost seg study for most people. 

This isn’t a light value-add — it’s effectively a ground-up level risk profile without ground-up pricing.Most experienced investors will want:20–30% margin on total project cost, or$400K–$600K+ spread between all-in cost and stabilized valueThat spread compensates you for:8+ months of zero incomeEntitlement and code-upgrade riskCost overruns (very real on 1950s buildings)Your time as GC/PM (which absolutely has value)3.

Consistent, focused study sessions are more effective than cramming.Remember, persistence and dedication are key.

Effectively making it kinda free. 

The interest rate of the new loan compared to the existing loan will likely have the biggest effect.