You could pay them their price on resell. 

I do not have any books to recommend but a subject to property allows the current owner to keep hold of the deed but gives you the control often for a limited time to resell it and then the balance of his price is paid and the new owner gets the deed.It is usually an owner financed deal and the mortgager is not told To make sure the regular mortgage payments are made on time, you can make them. 

But im looking to actually buy this property homes at around 70% emv Do a bit of remodeling and reselling.

If that's the case look for a more investor friendly title co, use your funds to close and resell, or get transactional funding. 

I don't want to turn around and resell because there is appreciation potential and I know the neighborhood and know that I can cash flow it.

. $45K with no down payment may be is a ok deal, as you can do a live-in flip then resell at $80K-$90K or refinance.

@Jacques Herve so you plan to buy properties then turn around and resell them and hold the note?

Know from a local realtor that you trust what a resell value in today's market is and make that your "value" number.  

My strategy is to buy & re-sell a couple of properties , before actually buying and holding.

Then, the decision on how much to spend on rehab can be decided on the market conditions for renting it out, vs re-selling.