Sorry to not stay on point, but do you really need an office space if you are bootstrapping? If you are in or near a major metro area, you could sign up for a co-sharing space where you can rent conference rooms for meetings with a team or clients or rent a desk by day, if needed. Check out WeWork and search for similar companies, there are so many with slightly different models so there is something for everyone. Also, if you need to meet with clients, you could probably get a better location through an office sharing place than afford on your own.
I feel the key to bootstrapping is not to commit to any kind of long-term expenses. That money can be spent on freelancers, marketing, branding, etc. Remote teams are very common these days, so many businesses cater to this growing in popularity trend.
You should consider @Webbie's advice about going with a shared office space instead.
Here are some things to look for in a lease (some of these apply to shared spaces as well):