I’m exploring new housing investment models.  

I suggest you call the CCB  and tell them what you want to do .. pretty sure they will say you need a developers license like I have .. or actually I have 3 of them for 3 different LLCs its a pain but after being fined twice you learn.then I would call the department of real estate and ask to speak to an enforcement or investigator and run your model by them..

In fact, either copied a "mentor's" model (btw, this mentor has no background in underwriting) or paid some Internet guy $100 to download their underwriting model i.e.

Its all about clarity in your criteria and your model.  

You can lower those appliance costs by waiting for sales or buying floor models.

As to renting, the current financial model from a re-fi some years ago provides a negative cash flow.

Maybe not for you, but burn one or two beginning investors and word will get around about your deals and valuations.I would strongly suggest doing manual ARV's first, and then maybe checking your numbers with the automated model, and go with whichever number is lower.This may just be my own opinion, but I would NEVER trust the ARV of a wholesaler who told me the valuation was automated.

I do have vacancy, maintenance, and capital expenditures accounted for in my model, and I'm running in the green by about 7600 a year- still, I thought the margins may be a bit thin.  

So I had an idea of learning financial modeling, and offering to analyze deals for a small fee ($20 bucks or so).

There is not really a no money down model persay that works in the real world of investing