Rent increase amount?

I have a 1,600 square foot 2 bdrm & bath home with 2.5 attached garages in San Diego 92104. I can't begin to find 1,600 sq ft comps, as most are 1,100 or less. Rentometer states median rent is $3,400 and the tenant is at $2,850. Long term (8 years) and I raise the rent every 24 months.

Seriously under market, so is $3,050 really a shit increase? If they moved I could put about $20k into it and get $3,600 easy. WWYD?