There is a lot of work behind the scenes and you are likely to end up ahead. 

Hi @Jacob GuttmanCongrats on your job and kudos for planning ahead!

Also can I use an FHA loan to buy a distressed property that needs repairs?

They are not allowed to do any repairs or modifications, none, without written consent.

Initially, we didnt give them they money until work has been done but based on the work and relationship we built, we decided to pay this one ahead for the next project. 

Identify necessary repairs and improvements.2.

But now I have to make part of the lease and get a signed form.I maintain the property and have emails and texts with the Tenant's requests for maintenance and immediately respond and have acknowledgment from them when the maintenance flks arrive to do repairs. 

Welcome to the community, you are already light-years ahead of most people with getting into real estate at your age.

Can I split the cost of the plumber and tank repair on both tenants, as they both clearly were using the wipes and it's very hard for me to believe they were NOT flushing them.

The tenants may not like the timelines or outcomes of the repairs - part is on back order, they have to pay for the repair due to abuse, the owner chooses to repair instead of replacing.