Budgeting with reserves: Roof, HVAC, and everything else that will wear out over time.Home warranty buyers = people bad at math. 

In a vacation rental in Florida, people want a pool. 

Basically out of all the people that were interested, I have chosen the people I liked/trusted the most. 

Most people advise 25% for that although in my own experience it's even higher.

Want tax advice - ask tax people.

Nothing crazy because I think you have the right aesthetic for the setting, but maybe some fake plants with colored pebbles, bed scarfs, hand towels etc can go a long way to add some life.

DSCR is the most common way to get around the LLC vesting and DTI requirements, although some people quit claim deed after getting a conventional financing.

My judgement is that I thought you couldn't do 1031 on personal residences but I'm not sure how you're classifying the co-op you've bought (most people that buy co-ops use it as primary residence). 

So I was hoping people here could educate me.I'm trying to calculate the interest earned on a $100k loan over 15 years at 7%.

If you just want to pick investor's brains, I'd start DMing people in your market right here on BP and buying them lunch or coffee.