Does it make economic sense to buy a house with private sewerage with the expectation that it will command a high value if changed to the city sewerage? 

It's dependability of the contractor that makes sense.

Hypothetically, if a mix property (commercial main level and two apartments above) only has $80k left on a $350k loan and the property is worth $500kand the taxes are $12k/yrand the rents are $4k/moand the owner is your father in-lawand he wants to sell but worried about the income taxesand he doesn’t want to buy another propertyand the building needs about $50k in updating and roofand you want to help him out by taking it over with seller financingWhat terms would make sense for him without a huge tax consequence and basically still get some of that income from the buyer, us?

Perhaps when the lease is up for renewal and the child is 18 years old you could then do a screening but it may not make sense to if he or she is good tenant at that point and continuing to share a room with the leaseholder.

I think NPN you have to   to make sense of it.other wise great performing notes since you have cash flow day one is a better bet for a beginner and you align with a great broker who just feeds you the deals.. much much easier and safer.then once you get the hang of it if you want to try the NPN and if you can find one that makes sense.other wise I think its a business and a job basically and needs to be scaled..

With current housing prices and the age/condition of homes in Milwaukee, does it make more sense to build than buy?

Viewed several properties in person with my agent and brought one contractor onsite to give a quote (working on getting another one there to get a second opinion, but I don't think the numbers will end up making sense)Figured out financing and how I will be able to make a deal work when I find a deal. 

I had 3 door knock teams.... one man one women... women kicked but men where there for safety.My wife is a lifelong realtor.. and there are certain things you need to do to be safe.. she kind of has a sense.. she gets crank calls and kind of has learned what situations not to be in.one of the major ones is alone with male.. she opens the house and stays on the front porch.. never gets trapped in a bedroom and would never go into a basement etc.talk to your real estate agent lady friends.. there are courses.having a firearm while great.. you have to be a quick draw and most can't hit the broad side of the barn with a pistol especially in a high stress situation..

Would a Condo or a Multi-Unit House make more sense?

I also attempted to look at job growth using the Census and Bureau of Labor, but I don't think my numbers actually made any sense.