They're different along the way.When you well with a seller help mortgage, whether a "pure" mortgage on a free and clear asset or a "wrap" of an existing mortgage, you transfer ownership and in exchange get a security interest.

Doesn't mean you will depending on your time horizon, geography, etc. but that's where the odds are from a pure appreciation standpoint.

If I go bigger and try a duplex/triplex, I might have to borrow some money so it wouldn't be a pure BRRRR.

In terms of pure money, of course DIY is cheaper, save for some monumental screwups.

I know there are dozens of variables that need to be considered, but purely for estimation purposes, are there general buckets that can be used?

REIHub is purely accounting.

That said, from purely a state tax perspective, South Dakota has advantages over more highly taxed states, like Virginia. 

I'm not sure if you're looking at a pure investment or a place you can use for yourself.

I would never rely purely on a wholesalers numbers but do your own.

That way you know how much you'll be paying when you live there and what the potential cash flow will be once you move out and convert it to a pure investment property.One mistake people often make is not figuring for management or the total amount of repairs / CapEx.