Is it necessary to pay that much money?

i haven't updated my numbers in a bit, but over the next 10 years, assuming zero percent appreciation, my rents will pay down >$600K in equity. 

If you have more than one LLC, each LLC should have its own set of accounts.Checking: Collect all income here, then use it to pay bills, pay the mortgage, or do maintenance.

You do not want to purchase into an HOA that previous owner did not pay his share of up coming cap ex leaving the buyer to pay the majority of the costs.   

Simply having a bankruptcy in the past doesn't mean that the tenant won't pay the rent.

People pay premiums to rent out full units and you have added privacy and easier to get lending on (lenders will count rental income on other units versus won't typically on bedrooms).

My thought was could I get it under contract and then market it to be sold and at the closing i would just pay them what we agreed upon and i keep the extra.

If you are able to make cash flow on the investment and have it pay for itself in the time of owning it, then it may make sense.

The customer only pays 1 price that includes the price for rehab and purchase.

I would love to just say "hey you owe 50% towards taxes etc." but I don't know what determines the commercial tenant paying which expenses.