Confirm with the vendor how often they are doing updates and improvements to their software, you want to get an idea of the roadmap and release schedule.Will you be using out of country investors, are you a Canadian and operating in the US or vice / versa?

I personally underwrite a deal to go either way because any good brrrr should make for a good flip and vice versa.  

Or vice versa.

The biggest energy savings will be from using a casement window instead of sliding, and of course everything is double pane nowadays.If you're replacing windows just make sure you don't have to meet new egress requirements if you change the type of window (from slider to casement or vice versa) usually you can replace them and be grandfathered if theyre the same type or not depending on your location.

So the higher return you're expecting, the more risk you will need to take (and vice versa). 

I have a great agent I refer business to in Indiana (and vice aversa).

(white cabinets, black granite and vice versa)- get rid of the double bowl sink, they suck, replace with a 33'' single bowl stainless or granite look alike. 

Let me ask, when you said "...45% of the property and its earnings," did you really mean that the investor would have a 45% equity stake AND 45% of the rent vice 45% of the 'profit?' 

Often places with low property taxes have high other taxes and vice versa.  

Contacts, suppliers, sub-contractors, local permitting and zoning process knowledge.... [5] Do you know the local Lien Release procedure and how to CYA on this--b/c it's important.[6] Do you know how to slump test concrete, and your potential partner does not, or vice versa...compare skills,,,and try to fill in weaknesses vs duplicate strengths.