Also, contacting neighbors is not standard practive for PMCs, so how much extra are you willing to pay your PMC to do this?

He is telling me that it is my responsibility to pay for a new HVAC unit which will run between $7k-$8k.  

Or could I 3 properties flow into one account and pay all expenses from there.  

If they buy something for your property and you pay them back, it’s just like you bought it yourself—so you can count it as an expense in your bookkeeping.If they don’t get reimbursed, then technically it’s a gift/donation, and you can’t deduct it as an expense.

You might find it useful to attend a meetup or two just to learn how other folks got their start into the industry :) I host a small/intimate meetup once a month in LIC, check it out here: https://www.biggerpockets.com/forums/521/topics/1214850-meet...

You have to pay to live somewhere.

You hired someone to do a service for your benefit , YOU pay . not the seller 

Insurance would cover it, I would pay the deductible, and no assets would be lost.If you are in an area like San Diego where people are more likely to sue, a judge is more likely to find you guilty, and the payout is expected to be higher, you may consider an umbrella insurance policy.

All rents you get from this property has to go back into the SDIRA but if you get a 20 year mortgage (that the rent can cover) and can pay the rental off by age 65 you will have turned that $90K into several hundred thousand’s of paid off real estate.

Pay to separately meter the utility.