Im looking to do deal such as Lease Option, Contract for deed, also subject to at the moment.

That’s called subject to, and it carries a lot of risks for the seller, and for you.

whenever i need help with a house or a building its covered. and every year it gets adjusted depending on how many houses i do. its a win for him because he gets passive income and if he gets a few more investors like me he can really expand his buisness,  and a win for me because i will cut costs and time by bidding jobs out.

Department of Justice (DOJ), covers places of public accommodation.

2nd piece is the house hack...We think best course of action would be to have an investor friend we know buy the house in cash, once we are done with renovations, we then take out a full mortgage on the house to cover whatever he paid for it and then pay him back with some interest.

You should consider that the moment you start a business you will be subject to self employment tax which is something like another 15.6%Are you assuming that owning a rental property automatically implies you will be cash flowing positively because that is something you have to make sure of and there is certainly no guarantee about cash flowing positively.

This means that if series 1 house is sued, they cannot reach into series 2 assets to cover damages. 

Can you imagine going into a gas station with a sign out front saying gas was $2.59 a gallon, and when you went to pump the gas you first had to pay a $15.00 fee for using their pump, an $8.00 "lot fee" for parking you car in front of their pumps on their property, a $17.00 "roof" fee because there is an awning over the pumps, and a  $14.00 "snack bar" fee to cover the fact that should you feel the need for a cool refreshing beverage, you have the option of walking in and purchasing an Icee for $1.99?

A couple areas have lighter paint from covering chips.

The bigger the discount the bigger the risk but I have performing assets in my portfolio with a unpaid balance of $20,000 and property is worth $60k, even if pricing fell 50% I still have my investment covered if the borrower were to default.