1. It'll be no different than if you didn't remodel - your home will be compared to other comparable homes in the immediate area that have recently sold. Items such as square footage of your home, the lot size, and the bedroom/bathroom count will be the biggest items when the appraiser is looking for comparable sales. As far as the upgrades, if the homes your home is compared to are in similar condition, then not much of an adjustment would be made. If your home is compared to homes that are not upgraded, then your home's value would be adjusted upwards for that fact.
2. Are you trying to sell? If not, and you are still taking about the appraisal, then I find it's usually best to be at the home when the property is being appraised so in case the appraiser isn't familiar with your neighborhood, you can point out all of the additional upgrades that the 'typical' home in your neighborhood does not have - every single item you can point out has the potential to help your value. I'd even recommend to create a list of all of the upgrades done, room by room.
3. It depends on how much you owe on the home, how much you purchased it for, when you purchased it, if you live there, what your credit score is, among other important questions. But a very simple answer is: 60-65% of the home's value if you use hard/private money. Most people don't choose to go with hard/private money unless it's their only option, so I suspect you would probably be in the same group of people.
On a side note - do you realize you posted this question in Florida, and not California? Not that it matters because you haven't really asked for region-specific advice, and so anyone should be capable of providing you insight on this. Perhaps you intentionally posted it here because you are a resident of Palatka, FL and the home in Manhattan Beach was an investment property. It's tough to speculate.
Feel free to ask further questions.