Double xp is an option. It does show that you gain 0 inf.
Yes, learn to play the market...
...
Bases are free now and I love that decision.
Create your own SG and house your alts in a base.
Start a small stockpile of IOs and salvage. Small. Sell alot(most) of it.
It takes no time to set up a crafting table, vault, and storage.
Teleport pad can be tricky, but easily figured out. I rely heavily on my Base for Travel.
I can completely kit out a 50, not with purples, but with Uncommon sets, Hami-Os, and, AT sets that I have accumulated.
ITF, especially a KM, will get you a lot of inf and help with your Incarnates too. I also do a Yin or TinPex as they are mostly short and repeatable without feeling like too much.
Market Crash is good for one purple, but I join teams that speed and selectively clear to earn substantial inf.
Double xp is a choice...