But your best buyers have already seen it and could have made the same offer without having to pay extra to you.

If you sacrifice short term profitability on your PM company for the long term benefit of building the PM company that will manage your future portfolio it should pay off.

To me, that's a LOT of money to pay.

If I buy a new property as a primary residence and move into that new house, will I still have to pay a down payment for an investment property if I plan to rent out the house I currently have after I move into the new house?

They offered to pay 10% interest on this loan.

If they will take interest only for the life of the loan, that would be preferable to amortizing as you can likely do better than 5% interest with the principal money you wouldn't be paying.

Does this mean I shouldn’t pay down mortgage with such high interest?

I don't want to pay for a separate subscription for each of my LLCs.

The x-tenant managed to move again and get a new car just this spring, so no motivation to pay us since it's apparently not crimping their style.

If you’re talking about paying over asking or having a larger downpayment: Those aren’t  expenses.