For my own piece of mind and that of my contractors, I would have an asbestos evaluation done if the rehab was likely to disturb any, IE tearing up floor tiles, siding or shingles, but I'd be weary of hiring anyone that also does asbestos remediation as they are likely to overstate/upsell. 

@Dannielle O'BuckleyPick your market by choosing a city you believe in, maybe look for job indicators or neighborhoods that are transforming, or the "path of progress".

At the mid-point (i.e. 3 years in) they only do an adjustment, but it is not based on a full evaluation/reassessment of each individual property -- a flat percentage is simply applied to a specific area to either increase all the values or decrease all the values based on recent trends.

If you don't have a good resource for learning about multifamily syndications, I would google the podcasts and writings of Rod Khleif and Joe Fairless.I have a friend in Glendale who would probably meet you for lunch if you came out there and bought, and walk you through some ideas/strategies...Keep in mind that this is a difficult field and progress can come very slowly.

I frequently work with Building / Fire Officials throughout the New England area to develop code compliance approaches for commercial projects or to assist with evaluations of commercial building acquisition.

From MY data, if you were to draw conclusions evaluating how everyone is doing marketing, everyone is doing it wrong.

Numbers first then, evaluate the neighboorhood, population, unemployment, etc. 

Explore some rent increase options and evaluate if you can offer any additional attractive lease-renewal options. 

If you're evaluating a market that it makes more sense in I'd just work with teams that can connect you with people they've successfully helped BRRR and maybe even people where things didn't go as planned.

Just do some research, get your "toolbox" in progress, ask alot of questions - but most importantly, pull the trigger!