Traditional advice is to never buy and hold real property in an S-corp.

http://www.biggerpockets.com/flip-analysis Make sure you account for Realtor Fees, Closing costs, Taxes, Insurance, Utilities, and rehab costs.I'm in Denver so you'll have to check the expenses in Miami but if your example house above was in Denver, your 180k example will have roughly 18k in closing costs per traditional realtors and title companies and 2k in insurance and utilities depending on the length of the rehab.  

The traditional financing options typically require a 20-25% down payment on a multifamily even if you are living in it.

Why not form a series LLC in a jurisdiction with strong Series LLC laws like TX or NV, register that Series LLC to do business in your home state, and then form a home-state traditional LLC to be the "management" company?

The other option is to go to a business or community bank for their HELOC's on non owner properties but they usually dont like any foreclosure or BK records.2) this is a personal decision and up to your preferences just, buyer beware and vet our your partner well3) there are many options unless you get a seller who is willing to carry paper, commit to a land contract, lease option, or other form of contract for deed or take back a note for their title interests to control the property with out using an actual traditional or private/hard lending sourcesAs a comment aside, I've funded conventional financing deals if the foreclose was documented to be within/included inside the CH7 BK discharge papers.

(Just make sure the technical specs are the same too)Example:200 dollar ryobi backpack blower 510 cfm 185 mphEVERYONE hates ryobi because it is chinese but I realized early on in the field that if you maintain your equipment and baby it like the expensive Echo's and stihls it will last just the same.

.” – Chinese Proverb

Less traditional methods of acquiring leads could be an avenue.  

I know for instance there cheaper than traditional single family and multi family there are investors that have made millions dealing with mobile homes 

The owner is asking way over what a traditional investor would want to pay.