There are also periods of zero appreciation for housing in past decades so we could be going through that. 

Put wording in it that after the one-year period she can renew at $xxx and just know going into it that she won't be able to afford this. 30-days prior to the end of the lease (or whatever CA requires for notice) give her notice to vacate and (assuming she doesn't fight it) she's out and you can get new renters in.

But, they are different kinds of auctions.....this could be someone who bought tax foreclosure properties where there may be all kinds of issues, redemption periods,liens, title issues etc. 

I'm looking to purchase 5 new units in a short period of time. 

Get a contract highlighting this a takeover of 'existing' financing, and give myself a 90 days grace period before the first payment.4.

Period.

As far as the wife moving out, do I do a long closing period; 45-90 days?

yes, sorrythey have a 1-2 months trial period

Do I lenghten the closing period to 45-90 days?

We are pretty equally leveraged right now and have 2 properties we essentially own outright, (one under IRA) and then the rest are in that typical 60-80% range with regards to our leverage.My justification right now for not continuing to lever up (ie: buy more move in ready to rent properties) is that after another probably 6 purchases roughly we have little investible funds.