However, San Diego tends to be a great market for appreciation so I wonder if I should just keep holding it for the long term.

Small MF properties tend to be either in south or north county.

Tons of demand from solid working class tenants  which is more my niche and what most of my BP clients tend to go for, you can also self manage easily these tenants so gives numbers a boost.  

However, they also tend to have higher interest rates and may require a larger down payment.Another alternative financing option is to partner with another investor or to form a joint venture.

Not necessarily a deal-breaker, but needs to be accounted for in extra cost)- Lathe and Plaster has pros and cons (Make sure you know them)- Insulation in modified walls (Old houses tend to have wooden expansion walls built against stone exterior walls.

They tend to pick on realtors.Anybody that wants to complain on you, guess who’s going to complain on you the most.

Those are unacceptable returns in such a high market though, with no margin of safety for a softening rental market which we as a state tend to experience a bit of during a downturn. 

Real estate investing - and turnkey and wholesaling in particular - gets a bad wrap sometimes so we all tend to be a little bit 'on the lookout' for scammers, which is unfortunate.

@Michael Orlando in rentals, this is a tricky situation as my experience with low flow toilets is they tend to be more maintenance (granted my sample size is low).  

As the buyer's broker, I located the deal before it hit the market and avoided being in a multiple offer situation or bidding war, as the property is in a generally popular area, where investment properties tend to be in higher demand.