They do hundreds of transactions a month and can guide you better than most attorneys when it comes to title issues.They use a complicated form that creates extra work and confusion with no benefit to the buyer or the seller. 

or not worth the extra money?

Id say its very similar to working with non investor clients aside from a little extra work and baseline knowledge of investing / rehabs. 

I'm particularly interested in purchasing two-bedroom, one-bath (minimum) properties that offer space and potential for adding an extra bedroom and bathroom.

Renting for top dollar gets you less rent overall when the tenants turn over yearly and it takes you extra months to fill the vacancy!

Looking to sell my home, but it is very much a home that will sell itself, how can i be the one to sell it insted of wasting money on extra fees of going through a realtor?

It appraises for $250k so the investor (after all you can’t sell to an owner occupant, the buyer who would pay more than the investor.) has to bring 20-25% of the $250k plus all of the $50k extra.

Paperwork to be signed is mailed back and forth and we only do our own lease as a formality and an extra chance to go in and check out the apartment to see if we need to fix something.

@Ryan Delauz Good point on the extra fees...

Preapproved ADU plans offer extra space or rental potential.