So can I still sign a lease and set up a section 8 tenant before I have done the application or inspection? 

No sellers disclosure was signed by me or the seller, nor presented at the time of closing.

The financials are as follows: Purchase Cost:  $247,000Cash Down: $37,000 (15% Down) + $2,500 (closing) $39,500Mortgage + Tax + Insurance: $1,548Monthly Rent: $2,250The house already had tenants who were signed on for the next year we closed July 25th, their new lease started July 30th and runs through the same date 2019. 

Its a beautiful property in a nice area and the tenants themselves are wanting to sign another 2 yr lease. 

And "for rent" or "fsbo" signs.

If they try and place a lien on the property and you have a signed contract by both parties documenting the scope of work in it's entirety, then you are in the right (as long as you paid them).  

No increase in rent or change in lease or signed statement was imposed, just written text message communication. 

The template allows you to use the lease for several properties & when the lease is sent to the Tenant for signing, you can put the rent amount, tenant name, security deposit amount, etc and it will be populated into the lease automatically.

Have these numbers in email, but didn't get any signed papers declaring the matter closed.

You need to be set up for it.Thus, to wholesale successfully, you need off market discounted properties no one ideally has access to.You need a handful of very serious cash buyers you can pitch your contract to.That is it.In order to do these 2 points successfully you need to check some things off the to do list.You need to be able to do a solid property analysis.You should only sign great deals.