Quote from @Wesley Tripp: I have found someone interested in selling their house using wholesaling but they have already started talking to a realtor.  

Start getting your education and analyze deals daily. 

Time on market is generally not on your side as a seller, buyers know that and offers will generally start to come in lower.

what are your thoughts/experience with turnkey for starting

When I first started I gave up a lot of profit to get the money to close these deals (up to 50%).

If you can find anything comparable that has sold in the area as well as if there's anything similar on the market, that may be a good start. 

Iʻm a new investor and donʻt know where to start.  

I used to have something like this, but it pretty comprehensive.I have the original unmodified version I started with that I can send to you if you'd like it.I believe its geared towards units where I've modified my version specifically for commercial industrial/office/mixed use developments.If you want it send me a PM with your email.

I have multi-family (600+ units) experience with start up for submetering water/sewage/trash via Conservice, electricity was always required to be in tenants name (with revert to owner and bill back in the event of a default in payment). 

It's at least a place to start.