Time the Sale Strategically: Selling the property in a year when your income is lower can place you in a lower capital gains tax bracket, reducing the tax rate on your gains.8.Deduct Selling Expenses: Costs associated with selling the property, such as real estate commissions, legal fees, and advertising expenses, can be deducted from your sales price, thereby reducing your taxable gain.9. 

Turn over cost when your tenants leave (check leases), marketing cost to add to the placement and monthly fees from PM, and utilities if those are provided by the landlord.What's your exit strategy?

I currently only have 1 duplex, however I want to set this up right so it will work for any size portfolio.Currently I haveHome folder>multi family/single family/legal documentsInside the multi family I have Name of property-> general property maintenance/first floor/second floor Inside of first floor (the one currently rented)I have, pictures (before and will have after) / lease documents / a spreadsheet with each month, what day rent was paid, if it was late, if late was fee paid?

Humans can be paid a finders fee in California. 

Even if they pay late sometimes, you have a late fee to compensate you.

I guess the purpose for this is to help fund community improvements and maintenance though it's a bit unusual since HOA fees and property taxes typically cover these.

Check fees, as agencies usually charge a percentage of what they recover.Thank you! 

More likely, he is hoping to use the extra time to collect more rents and thus more fees to generate the funds to pay his owner clients:(

Because we don't refund application fees. 

What's a reasonable fee?