Gotta catch 'em all but don't have time? Call on the services of Alicia Thomas, a professional Pokémon trainer--yes, professional. This is what she does for a living.
According to her Craiglist ad, if you pay her, Thomas will login to Pokémon GO with your account credentials and quickly collect many, high-quality Pokémon:
I will walk around in 1-4 hour shifts signed in to your account capturing every single Pokemon I come into contact with, activating every Poke Stop I pass and walking nonstop to help hatch your eggs. I'll even send you hourly updates while you're at work/class/on a hot date informing you of any really exciting things I've come across for you. Pokemon training help, gym battles and strategy tips are also included, if requested.
Thomas isn't just some random person with a phone. She's a Pokémon expert and is prepared to be the best trainer you've ever had:
Personally, I am a level 15 trainer in Pokemon GO right now and control all of the gyms near my place. […]
Details: I currently own an iPhone 6s, several portable chargers and am in very good physical fitness. Spending hours on my feet is not an issue.
I admire her entrepreneurial spirit. As the Ninth Rule of Acquisition says, "Opportunity plus instinct equals profit." Thomas's instincts guided her to an opportunity and she's seized it. I hope she makes a lot of money.
-via Jeremy Barker
Also, under Android Developer Options is "Allow Mock Locations". You can feed your phone a list of GPS coordinates and the apps running won't know you aren't actually traveling to those locations.