If it would fetch another $10-15K a year in rents, what would it be worth paying to do the addition? 

The home needs about 10k worth of work.

I'm particularly passionate about fix and flips and rental portfolios this are may Area of Real Estate InterestExcited to learn and connect with you all!

Seems like a nice convince but maybe not worth the potential phone calls. 

If you get quality tenants who fit your criteria (it's different for everyone), it may be worth it to rent the home.

One sale can be worth 10-20 leases or more, personally I would rather work really hard to sell a few properties if I was just getting started.

I'm assuming they had to get some kind of permit to move the mobile home and connect utilities.

He has come up through the ranks as a wholesaler, then fix and flip, and now targeting missing middle new construction/development deals.I'm beginning to research GCs/investors that do this type of work, and figured it'd be worth exploring the BP network.If you deal in this area directly, or have a connection I could speak to, that would be much appreciated.At the end of the day I am trying to get round number hard cost estimates on 2-4plex/Townhomes.

The effect was that he had near 100% financing, and a property worth $450,000 at a cost of $381k.  

Definitely worth looking around for in-person events because there doesn't seem to be a lot of activity here on BP for the SLO area.