I've built several successful SaaS/DaaS startups since I quit my last job back in 2005; mostly just for freedom. (money too I guess)
Also do you have thoughts on bootstrapping your SaaS versus getting funding for additional hires?
I've never looked for nor accepted funding. Freedom is my main motivation, and it is limited somehow when you accept money. And for complete freedom you must go it alone.
In my latest project however (poidata.xyz) I'm a co-founder.