When remodeling homes, a lot of times there are unknown issues uncovered during the process which was not known beforehand.

OK, my definition of a wholesaler (which may be wrong) is someone that offers on a property with no intention of taking title or risking $0.01 in escrow with the sole intent of selling to an unknown (at time of M/A by seller) 3rd party and pocketing the margin as his profit.If someone took title with the intent to flip the property, I wouldn't call them wholesalers then.Correct me where I'm wrong, but I don't even consider them investors, but more like used car sales guy (however, they do have to own the used cars for a while, so maybe I'm being generous). 

Due to the unknowns of any rehab project, overruns are very common.

.), income, cashflow, debt, DTI, equity, property appreciation, rent appreciation, mortgage paydown & amortization, rate of net worth growth, cost of living increases, hours worked per week, cash on hand, etc, etc.I have short term (12-24 month), 5 year, 10 year, and 15 year projection models...sometimes I'll mess around with longer term (20+ years) projection models, but it's pretty difficult to project that far into the future, because there are so many unknown factors--so, the longer the projection model is, the less I tend to believe in its feasibility...My projection models allow me to make more informed decisions about things like: whether to buy or sell a particular property, whether to refi a property, whether to rehab a property, whether to pursue or abandon a particular revenue stream, how to approach rent increases, how to manage risks, what debt to pay down first, whether a particular goal is worth the amount of hours I'll need to work to achieve the goal, what my goals should be, how to achieve various goals as efficiently as possible, etc., etc. 

The rental income equation is the biggest unknown to the buyers not familiar with the market and is a function of number of beds, location, amenities, and distance to the beach. 

I have been using software (deal check) that fills in a lot of the unknown/common information for me and that's where I get the negative cashflow.

simple things like rental income and expenses...and things like cash-on-cash cannot be applied to a market because there are too many unknown variables.

There’s too many unknowns you’ll run into that gurus or books can’t teach you.

Do I Comp it against Improved Land sales or the newer structures selling on that street even though it's unknown exactly what the new structure will be ?

We have so much unknown changes to come in the next 12-18mnths that who the heck knows.