I don't think $175/month is good in Florida (or anywhere) for 30 percent down, but it also depends on what the rest of the block and area is like and if there is appreciation scale.

Depends on how long you would like to live with your parents.

Rates and expectations vary depending on the relationship and the investor's comfort with risk.

My latest blog - linked here  "UNDERSTANDING FLORIDA'S EVICTION PROCESS AND LAWS"  provides a comprehensive guide to understanding the legal requirements, timelines, and steps involved with Evictions in Florida.

but they don't provide current rent, value, what they have capital wise, etc. 

Provide them proof of your ability to find, fix, flip (or whatever strategy you plan to use), and then start with small amounts of their money.

Most PM's here charge 15-20%, most are 20, but will depend on what services they offer.

As a few have mentioned, the best way would be to call the listing agents directly, but depending on how much time you want to dedicate, setting and going on multiple appointments with different people could prove to be time-consuming. 

All of this really depends on your goals and timeline though too.

Big things is be realistic on timing and maybe provide a mover and or storage unit deposit as they may not be able to figure that part out on their own.