When to refinance an STR

[Louis Louisius]

Hello, 

I purchased an STR for my first investment property for $725k and 20% down = $160kish after taxes at closing

cosmetic fixes, repairs and and new appliances plus furniture $70K(I think this killed me a bit)

house valuation after closing was $750K

currently all in $230K

after monthly avg income I take home ~1,500k/month

current comps in the area are $850k and up

when can I refinance my str to get my money out so I can do a new/better deal. do I have to wait a full year to refinance or can I do it now