We made an aggressive offer quickly.

The key is to have clarity on what each offer and then decide what’s best for you.

If they pass that initial trial period, I offer a 6-12 month renewal. 

A single property is simpler to manage, carries lower financial risk, and offers streamlined tax reporting but may generate taxable income sooner.

However the owner comes from corporate world and they started out doing deep dives into markets and moving Hedgefund type portfolios between large investors.. they then decided to offer there service to smaller turnkey type and one offs..

I have a good friend who has some great data on all the different neighborhoods - I am happy to share that with you.Also, if you don't have a lender already, I have some rockstars that I know like and trust.What sport do you play?

Since this is a rehab, you shouldn't have to worry about offering a builders warranty but here's some things I've become accustomed to doing to make the warranty, sale process and transaction process easier.  

.: Quote from @Jefferey Eutsay: I'm considering making an offer on a 36-unit multi-family property.

There are a lot of options with a 6 unit building, and I agree without more details that it will be hard to offer any specific advice. 

I'll admit upfront that I would never own rental property in CA, so that colors my response.I'd offer the tenant up to $10K to leave immediately, keeping the eviction off their record, then sell.