If I were to hazard a guess, would be lucky to get 1 in 20 bids accepted. 

That's very acceptable and reasonable. 

I typically am not accepting far future bookings.

What kind of return you can accept depends wholly on you.

Registered agent is in case you need to be served legal papers, they will accept them on your behalf unless you would want to be served at your home or work, and technically it must be a place where you are available between working hours. 

There was another property in Mississippi I was trying to buy that was listed on MLS but someone made an offer that was accepted before I could make one.

Read our copy & paste advice below on better screening for a PMC.Recommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

I'm assuming social media is the answer...

No one will accept an offer like that (for future costs being too high) and if they do, there is an issue.

Accept whoever applies" is an idea that would cost you a bucket of money in the long run.Bankruptcy is usually a "no" unless it appears to be a one-time event caused by something out of their control such as a massive medical bill or a business failure.