I can check in with my local bank, but I don't want to waste their time when I'm not yet serious about doing a loan with them.   

Call some local HVAC/Mechanical companies and ask what the average cost would be for this upgrade! 

These deals can be profitable in growing markets with strong cash flow and equity growth, but success depends on the builder’s execution, local market conditions, and your ability to refinance effectively.

I'd highly suggest getting to some local meetup groups in MKE:  https://www.biggerpockets.com/forums/521-real-estate-events-...When you say you are considering alternative financing options, what does that mean?

One way to save some money, especially if you are local is to split the job. 

My father was a member of the IBEW out of Local 6, so I have a deep respect for your profession.Are you planning to use the BRRRR strategy on a 4-unit, or are you leaning toward a turn-key investment?

If you want to network or ask specific questions about your local market, go to your local real estate forum and connect with investors from your area: https://www.biggerpockets.com/forums/86-local-real-estate-networking5.

Happy to connect and provide you with a list of the local meet ups. my cell and email are below! 

Go to BUILD YOUR TEAM at the top of the screen and look for local investors or meetups in your area.

As U.S. citizens residing in Europe, we are required by the local tax code to hold the property in our personal name.