The list is getting too long to keep track, problems and variations are almost endless, redemption rights are pretty easy to overcome with escrows if such is applicable.

Am I going to have to trial and error this game until I figure out what can sell for what?

The truth is, you could read 100 books and still not know enough because certain things need to be learned through trial-and-error.

You can first sign a contract with a trial period with her.

., staff is very helpful. there a free trial I give it  thumbs up! 

Yes, there's a lot of variation in that area, you would need to provide the block number or the actual address to receive an accurate "valuation". 

Sometimes creating your own system can be way more expensive as you learn from trial and error than from buying a system.  

As others have stated find out what you are good at by trial and error and go from there.I started out with a 2 family tyhat I owner occupied and when my tenant was paying 3/4 of my mortgage payment I know Iw as on to something and said I want to keep doing this and grow it!

DM me if interested - I can give you an intro and likely get you set up with a trial of his deal package.

I've heard of variations of those strategies, but haven't looked into it in great detail.