It'll be like a weight off your shoulders. 

You might look to a weighted average of the contribution of smaller and larger unites, a duplex and 4-plex for a tr-pex.

I know there are reliable companies out there but its tough to find them and when you do, they are worth their weight in gold.My best to you

Know this: that person is worth their weight in gold, and can be the primary person that you run things past or ask questions as you move through your day.

Also, is the floor on which you plan to build engineered to take the weight of a full structure?  

I want to check them all out and weight out the options.

Underlying principle for our deal analysis is that while we value cash flow to expedite saving for future deals, we are much more weighted towards 1) great deals at purchase, 2) long term appreciation potential, and 3) getting as much of our capital back after refinancing as possible to repeat.

Neither has the weight of an appraisal.

If you were to hire an appraiser, he/she may use the "income approach" i.e. cap rate and put some weight to it but recent sales carry a lot of weight in determining value. 

5 plus units the appraiser is weighting the income approach more than anything.