I can't imagine how a sealant could waterproof joints that move, expand and contract. 

trying to make a deal with a triple wide/shop and 20.1 acres, zoned ag, looking to put in rv spaces. if i can get the owners to carry part of the contract do i still have to come up with the 20% down payment.

I’m an agent and have a listing under contract.

He shows up and gets the work if I buy it (contracted).

My goal is to buy 250 units by the end of the year, we are currently under contract with 41 units so hope all goes well!

They are going to go off of what the contract says.

I've never gone through the private lending process before and the contract feels very burdensome.Could I ask one of my fellow BP members to take a look at the agreement and let me know if there's anything weird or that you wouldn't be comfortable with signing? 

I'm new to to real estate investment industry, how do I get my first deal under contract ?

Look at the contractor's own contracts, if he or she does not have their own contracts then they are not truly serious about their business and is a red flag to me.If you do want to take the risk of using a cheap general contractor or using cheap subcontractors then I would develop your own master agreement for your contractors and have them sign it in order to let them know what the standard is.

This scope of work should act as your contract for your contractors to hold them accountable to their bid so there are no questions on what was or wasn't said during the walkthrough.After that, I recommend hiring a contractor that has their own contracts for you to sign.