Buildim has a general ledger so you can record credit card transactions the same as in any other bookkeeping software 1- add to chart of accounts a current liability called for example capital one credit card2- when you want to record a credit card transaction go to general ledger create a journal entry, for example if you swiped your card for a maintenance expense in the amount of 1,000  youshould debit maintenance 1,000 and credit your liability account called capital one credit card for 1,000so your liability account balnce is always the same amount as your credit card balance 3- if you pay intrest on your credit card add to charts of accounts an expense account called capital one intrest fees and when you got charged intrest create a journal entry debiting capital one intrest expense account and crediting your liability account 4- to record a payment to your credit card you can record a check from your bank account payable to capital one you should add them as a vendor or you can do a journal entry It simple for anyone with a little bookeeping knowledge and btw thats how its also done in quickbooks or anywhere else And thats the correct way doing it although there are a few other workaround ways for exemple creating a contra asset or as paying a vendor So i dont know why you blame buildium it would be the same with any other software 

Please let me correct your first statement: Sellers "PAY" the buyer agent commission because that is most practical.

I'd estimate your cash flow after you pay the loan payment would be $600-$800, which a lender that understands investment real estate should give you some credit for on your DTI.As for a bank, I have a specific lender at NBI that I would recommend.That 600-800 you are factoring in the HELOC repayment each month too, correct?  

I was recently corrected as I thought 12 states required license but it’s up to 18 states now from what one of the BP experts let me know.Department of real estate for re brokernot sure on the cfl.

I believe you are correct.

Be careful following the advice of strangers on the information superhighway.My apologies, you are correct on Familial status meaning pregnancy/children, I was indeed thinking more of marital status.

Quote from @Roni Williams: Their communication is non existent.

I don't think you are going to be able to get insurance for two separate living units in a single-family when they are both illegal and likely do not have the correct egress windows (basement) for fire safety which could subject you to huge liability if something happens to either party.

STR is a slowly dying model that exploded in the last 10 years and correcting big time.

Asking in the correct forum will get a better response.Read the RULES!