For a flip we did under 100k I regretted tackling the floors.

The Option 1 an 3 seem great and if you have the time to tackle both (or all three) then go for it. 

It was suggested to me by the brilliant @Mindy Jensen to tackle the landscaping/common areas first, then rehab units as they become empty (from tenants vacating or being removed).

Yellow Letters (Postcards Are Most Financially Efficient)The Bigger Pockets blog article by Chris Feltus, tackled the age old question of whether Yellow Letters or postcards produced higher quality deals.

I now can tackle 2 jobs being open at the same time while I am working my day gig.

is a serious question to tackle... im workin on it lol.

Early on I started out with a 20 unit multiple property C-class seller financed deal and it almost bankrupt me as I didn't do my analysis correctly.It's great that the seller is willing to hold paper but be sure you aren't massaging the numbers to create a better deal than what's really there and be especially certain you have sufficient cash reserves to tackle a project of that size even if it's 100% financed.  

fixed a visually large foundation problem for $10,000 that apparently everyone else was scared to tackle What was the outcome?

Of course there is a risk of getting accepted from multiple offers at the same time, but with some contingencies or countering it can be tackled.

Should I sit back for 6 months or so and then tackle my next property?