Tampa and the outskirts are good areas to start developing expertise in, there are growth areas all the way down to Fort Myers for your area.I would get clear about your property type/range - if you are focusing on one area only then make sure your area is forecast for some decent growth over the next 10 years if you are aiming to hold it and rent it.

Your higher range will be tougher though if you are going turnkey.

You build your network over time and it takes a lot of hard work.You do not just flip a switch and all of sudden a bunch of high net worth investors start working with you.I have clients with net worth over 100 million that are individuals and clients worth 1 million so the range of what they buy varies in price range.If you truly have something not listed on the market then reach out to your colleagues as they might have someone in their network with interest.I have clients right now that can take down no limit on multifamily in price.

Get an idea of the possibilities, price range, and cost of capital. 

Brokers can be hugely helpful, but as mentioned there are A LOT that have deals in that 2-12 unit range you mentioned. 

I guess, price range can be tween $350k-$1M.

I would say 2200-3200 is the range I've seen on refi costs in Illinois.

If it helps, I have a number of clients with 500+ units and most purchase $10M umbrella policies with a handful electing for higher limits in the $15M - $25M range.

Obtaining financing on a property with a purchase price in the $50k - $75k range is a bit tough.

Comparable rents in that area range from $950-$1150 depending on upgrades/amenities.