You are not allowed to compound interest.If you bought the certificate from the state on a best price offer, you charge interest on your purchase price, not on the full amount of the taxes that were due, but were not paid by you when you purchased.After you obtained your tax deed, you are entitled to something called "mesne profits" if you file an ejectment lawsuit against the former owner and they redeem during that lawsuit.  

If you would really like to explore the sector : why not go and message 10 to 20 operators and offer to look after their property or clean their property for a month in exchange for their knowledge and details on the numbers.

Why is the seller offering Creative Finance14.

A revocable trust offers excellent estate planning benefits but provides limited liability protection and no tax advantages, while irrevocable trusts provide stronger protection but less flexibility.

This just protects our investment until probate is finished.Get creative with your offers you never know what will interest a seller.Have a conversation and find out their needs if you can before making offers.

And maybe @David Krulac has some further ideas to offer ...

My offer got accepted for an investment property in Pennsylvania.

The owners of 100+ unit complexes are not individuals who will be swayed to sell by a good offer or the need to cut short term losses.

Smaller or Partial Deals – You could fund lower-priced flips or offer gap funding (covering down payments, rehab costs) alongside a hard money loan. 4.

I believe the price points of the apartment units will dictate appliance specs/packages but appliances are something I always upgrade over those offering competing units.