Help! Is it worth it?

[Troy Forney]

So we have purchased 3 single family and 1 duplex in the past 3 years.  They are cash flowing fairly well.  About $200. per month per unit after expenses, cap. ex etc...   Averaging 40k equity per property and I do see the tax benefits.  It just seems every time I turn around taxes are going up or I have to fight the assessed value.  With only 4 properties it seems to be getting a little bit of a hassle.  We do have a management company also, but are hands on working with contractor, cleaning etc...  So it is not bad, but I just wonder is it worth it?  I need like 20 units or properties at this rate and I fear I may regret if I keep going.  

I just need someone to convince me to keep going.  Thank you.