another opinion.... For what it's worth. If it were me, I'd keep the house, I'm a fan of diversification and it seems like in a hot market like SD you shouldn't have a problem getting a nice tenant in there for 2,500-3,000/mo.
So here's what my actions would be. Spend a few months reading everything on here and inverviewing PMs. Find a bank and lock in a HELOC. Give the 60 days notice that rent is going up to market (use a lawyer). If they stay great. If they leave, take some vacation time and go oversee/work on a cosmetic renno (10-20k), funded by your HELOC. Rent at market rate.
Now you have a wonderful asset producing income and appreciating in a wonderful market (and an excuse for a tax-write off beach vaca a few times a year) AND upwards of $300k on your HELOC to invest locally, or in the stock market, should you choose.
You are in an fantastic position--- take your time and think about what you want to do with your fathers legacy. Keep us posted.