Missions & Complexes

Mustachios and glasses are best.

The comments below are made from personal experience deal with some of the areas and playing with others who have done the rest. Based on your other statements, you are probably looking at burner missions as your best option for literally no worries play.

- Burner Missions

Pros:
You can stay in one station/area.
You can play for short periods of time
This also includes blitzing specific lv4 missions

Cons:
Can take a while to get multiple alts standings up to get several alts to pull missions. This lets you decline more missions easier.
Need several fairly well blinged ships for different missions

- Incursions (high sec - maybe low) (Let's face it, you are not going to do low sec incursions with limited play time and unless you know someone, you probably aren't getting into those groups. Therefore, we will stay with high sec)

Pros:
Very good isk per hour
Most of the groups have experienced players who know what the heck they are doing
Fairly flexible LP

Cons:
Incursion comms can be some of the worst out there.
Spawns move, so you may log in and have to jump 20+ gates to get to where they are running.
You sometimes have to wait for fleet invite - Hard when you only have limited play time
You need a specific fit that is pricey.
You need the skills to fly the ship how the FC wants


- Lvl 5 missions

Pros:
See pros for burner missions

Cons:
See cons for burner missions
You are in a capital in low sec. People will hunt you.
LP conversion can be a pain.

- Factional warfare

Pros:
Easy to get into
Missions can be done fairly cheaply (not necessarily a bomber anymore, but still cheaply)
Can stop and go as you please
Can make good money/LP

Cons:
If you are using your main, you will trash your standings with one/two empires
If using your main, you will be in constant war even in high sec.
LP conversion can be a pain and swings wildly at times.

- Lowend WH's now with the new citadels

Pros:
You have been in a C5, so the same pros here but for less isk.

Cons:
Again, same as a C5 but with cheaper ships

Welcome to the real world where things like jobs will have a drastic impact on your EvE experience.
My suggestion would be to basically treat this in the same way you did when you first started to play EvE. Explore around, experiment with the various options and see which one / which ones give you the most enjoyment.

ISK is highly overrated especially in these forums where the viability of anything and everything seems to be measured by ISK / LP per hour instead of fun per hour. If you are having fun and have enough ISK to do what you want then you have all the ISK you need, spending time to acquire more ISK is simply wasting time that could be better spent having fun. If making ISK simply to make ISK is what you consider fun then ignore this paragraph.

find a c2 wormhole with a c3 static, farm c3 sites for easy 200m/hour

yes you will die but probably not before you've made the isk you used to make the ship back

Quit Eve. Work like worky thing. Get promoted. Re-Subscibe. Buy Plex.