Marigold basically does webwork for her dad's company. It just means that she can work from home.
^^This^^
You wouldn't know it to look at her ("Self-esteem undetectable with current technology"), but she's actually damned good at it and actually earns a decent wage. Also, Marigold's naturally frugal and lives well within her means, so, at least in my head canon, she actually has a fairly comfortable bank account.
As for other characters:
Marten - Was living month to month but has since come under the influence of a floofy-haired ginger hottie who has, as part of a kinky sex regimen, forced fiscal responsibility upon him.
Pintsize - Loaded from selling Internet porn to both humans and 'bots, probably has other less savory income streams but we don't really want to know about them.
Dora - Worth plenty on paper but few liquid assets - it's all tied up in her business and can be cash strapped sometimes.
Tai - Has some very successful investments in other states, notably Washington, Oregon, and Colorado. She does okay.
May - Barely getting by on the support of friends, would have either starved or turned to crime and gone back to prison if she were a meat person. Has turned to prostitution with Pintsize as her John for extra cash.
Faye & Bubbles - Struggling small business owner/operators. The nature of their business demands substantial capital investment in equipment and parts-&-materials inventory, so getting ahead may take a while. OTOH, their work is getting compliments from people who are qualified to spot a good job (see
#4030). This may be the beginning of a professional reputation that will serve them well.
Jim - Pretty successful small business person.
Veronica - Probably has herself comfortably set for the rest of her days. If she were to turn to blackmail, she'd be almost as loaded as Pintsize. We shouldn't be surprised if she turns out to be publishing kinky one-handers under one or more pen names.