Here are a couple links if you want to get started with my work, all focused on bootstrapping profitable SaaS companies:
[Stair Step Method of Bootstrapping] https://robwalling.com/2015/03/26/the-stair-step-method-of-b...
[Podcast] https://startupsfortherestofus.com
[Book] https://saasplaybook.com
[YouTube] https://microconf.com/youtube