From what Ive read, it looks like I may have to get a business certificate to do this in SF but Im not sure what that entails or what else is involved?

Could you kindly suggest the best resources or methods to identify comparable properties in the area?

That could involve mediation or court, OR possibly if nobody takes an action you may simply be awarded the EMD back after a certain time period.

And given that, in a major city, there are hundreds of houses put on the market weekly, you need a method to efficiently screen properties to make sure they won't bleed money before you spend time analyzing, touring them ect. 

Staying involved in a business partnership while dissolving the marriage will rarely work.If you split the properties, I recommend hiring a good property manager.

With that money - I am using it to invest using the BRRRR method. 

Changes to local landlord/tenant laws and new situations involving tenants lead to these annual updates.

Having them deposit the funds in your account each month is the only other viable method IMO.

That is the true value of participating in things like this that are a bit more involved. 

Is there some other way to verify his involvement?