I think the most important way to enter a new market is founder-led sales. It isn’t a volume play, but it’s the ultimate “do things that don’t scale” technique. It also ensures you aren’t putting the cart before the horse when it comes to validating that your new market is one you’re ready for (and that’s ready for you).
The nice thing about SaaS is that a relatively small sample size is usually extremely effective way to validate your market and start getting some growth engines going. I am always partial to networking my way into warm intros in the form of “product feedback” sessions (ask for advice, not money). The feedback is legitimately the important part, but if you are onto something a decent number of those will turn into customer conversations too.