The current date reflects that who is buying right now, are people under 40 years of age.

Other ways from what I can see is you want to target FSBO, rentals, and maybe expired listings and propose a subject to, lease to own, or other creative method. 

Would you rather they stop charging you or would you rather they "hold on to" your money until some unknown future date?  

Time is running out on my contract to purchase, and am surprised it hasn't already expired. 

Hi, we already submitted an offer letter today for a 4-plex asking price $310k (2beds 1 bath) and we are the 1st one to offer them after the previous buyer's financing fell through, the seller agent sounds promising. 2/4 tenant contracts are inconsistent with dates and the seller said that he lives in 1 of the unit which is not consistent with contract dates.

It's a 3 bed 1 bath on each side and the other side is mostly up to date with tenants that were already under lease.

I typically don't have subsequent move-ins scheduled very tightly after move-outs, so when this happens it's more of an emotional hassle than anything else (because the tenant wants to then argue that I'm a monster for charging them rent because life happens . . . c'est la vie).If these one and two day delays significantly derail your process you might consider instituting some kind of "drip reminders" of the checkout process . . . starting 2 weeks before the lease-end date and dripping as often as you see needed to get the tenants out on time.

Read the leases and see what date rent is due and what date rent is considered late.

The reason being you could use your 121 exclusion before it expires (2 occupied of last 5 years owned).

I do know that as the Lease gets closer to its expiration, then the value of it (the lease) drops significantly.