Then I'd use the other methods provided by the gentleman who have answered prior to this post.

It didn't come with AC but was pre plumbed for it.

@Matthew Jarrett I have a unique method for JV, hopefully I will be out there this coming month.  

From there I will be building my portfolio with other methods.

@Kimberly Harrell, if your budget allows, I would continue with the purchase and install new PEX plumbing. 

It could be a way of avoiding confrontation with the tenants, rather than the " I know a guy" method.

Is It both methods? 

I put a lot of $$ into bringing the electric, plumbing  up to code.  

I can't speak for all TK providers, but since my model is designed for long term buy and hold, then I am going to over renovate the home with granite in A+ properties, vinyl plank flooring in high traffic areas, brush nickel faucets, oil rubbed bronze fans, brush nickel cabinet knobs/handles, new vanities, new counter tops, address 98% of the items in the buyers inspection report, thicker carpet and carpet pads in the bedrooms, ceramic tile in showers and bathrooms, new supply hoses on all plumbing connections, update electrical systems, fix/install fences, repair outdoor storage, etc.  

We bought our first 100+ year old house as newlyweds (read: naive children) in 1998 and have lived in and renovated several since, selling for a decent profit each time and learning how to do things like remove milk paint, do plumbing and wiring, and jack up a porch to replace failing beams.