Since you are right out of residency with a good job and not married and no family, you are in a unique spot because you have flexibility right.

My neighbor has listed his but also has had occupancy issues as an STR and said that most people looking for either rooms or cheap stays but I can't comment on that as I have no experience listing as an MTR.

If I spend at least 300 bucks or more I get 6 to 18 months no interest. 

Determine cost to renovate. 

God's honest truth, so my answer would be NO. 

I have a capital gain taxes question:if I sell my home for 510k and provide the seller 10k seller credit towards escrow costs, would I be paying capital gains taxes in California for that additional 10k?

No invoice, no mention of what this is for. 

There’s no magic potion.

I had 5 houses with them that were terribly managed (placing bad tenants, extremely high rehab costs). 

According to the realtor, this county doesnot need a STR permit. guessing no inspections?