How long a period is acceptable before you "strike out" on your own?

You can "test" the yellow letter, but personally a nicely laid out business letter is better.It is important what you say and how you say it: also something that draws the recipient attention on the envelope is important.You have to strike a chord with them - if you are sending letters to people in preforeclosure, be understnading of their situation, without patronizing.

Past the three strikes, and they are out of the MLS permanently.

Find the people who cant afford their lot rent anymore, or talk to park owners to strike a deal. 

If you are open, it would be good to meet, compare notes, perhaps strike up a friendship over our shared interest in RE.

You have two strikes against you:1.

Busted meIf you supply appliances in the lease, then everything must work, including all burners and knobs.Everything must be clean.Door locks, strike plates.

Additionally, you would pay a PM to handle all of the aspects not part of the Super's day-to-day at probably 5%.Reserves also strike me as low ...

Money you may spend may be applied to the strike price, it is not a loan and can become a lien. 

Sometimes it is better to take the quick strike and move on to the next deal.