Detached HousesWhen in doubt, consider the tried-and-true detached single-family house.

try to get the owner to finance it.. 

Short-term rentals of non-owner-occupied properties will also require a special use variance which is obtainable by starting with the completion of an application in the Zoning Department."

Lastly, all of the housing maintenance and responsibility for utilities will be the responsibility of the tenant buyer so you will dramatically reduce your expenses. just a thought.

Do I just have to go by the actual numbers like revenue from last owner and taxes?

Usually the type of work has to be dealing with the real estate itself, not just providing a service that is applied to a part of the house/building. 

Same with houses and the MLS.

Your financial background is a huge asset, and it’s great that you’re starting locally in Milwaukee while keeping an eye on future expansion.If you’re looking to connect with like-minded investors, the Rental Property Association of Wisconsin is a fantastic resource for networking with rental portfolio owners, accessing legal resources, and finding contractors. https://www.aasew.org/For mentors, funding sources, and flippers, the Milwaukee REIA is another great group to explore. https://www.milwaukeereia.com/I’m a member of both and find unique value in each—maybe we’ll cross paths at a future meeting!

Most suburban cities have VERY limited lots and most of those are zoned R-1, meaning only a single-unit house can be built.In the City of Detroit, it's cheaper to buy one and rehab than build!

Which options do you guys think are best when you have no money to put down on a house for flipping?