I'd recommend starting with the lower hanging fruit than a large basement reno - if your comps are close but don't quite get you to your number.Finishing the basement (with proper egress) could push you over the top, but confirm with an appraiser first to ensure it counts.

Juan Mendoza not sure about your state, but in California, technically speaking, you do have to have a built in closet of some kind to count a room as a bedroom.

I cannot comment is $100-120 is high as I do not know your market, and I do not know size of unit, bed counts, etc. 

Went over budget and still counting.  

It seems they have crossed into CPA territory and no longer need do it themselves.

Quote from @Michael Smythe: @Kwanza P.Recommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

Recent sale of the assessed property is de facto value.Expert is needed for anything else.They can raise the value if you appeal.Comparable sales only count if they were closed before the lien date which is one year prior to the tax bill date.

We sold 3 locations that had little debt on them with great cashflow, stayed heavy in cash, our stock return was only around 11% versus 25% since we went conservative, have two projects banks have already greenlighted with no downpayment on our part using cross collateralization with other properties- built in $2.5mm equity creation in 3 years in those projects, on hold for now.  .   

Crossing the lines may not provide proper liability protection.Personally, I just kept my SF rentals in my name and got excellent insurance coverage, $500K per property plus a $2M umbrella.

Where you fall in that range will be dictated by bedroom count per unit and the quality of the area/building itself.