I talked a little bit about this before, but the short answer is that I refuse to see blogging as my job. I'm up in the air about whether or not I'll register my own domain, but I probably won't ever migrate to WordPress or freak out too much about sponsors or affiliate links or so on. I think burnout happens when people convince themselves that they should be earning money from their blog. They start churning out content a little more regularly, even when they don't feel like it; after a while, the exhaustion begins to show. Normally they'd take a break, but because they feel like they need to keep posting regularly so they can keep readers and get those affiliate links/clicks/whatevers, they keep going.
Usually this is the point where I start thinking about dropping a blog from my feed. I read a decent "received a free whatever in exchange for a review" post maybe like 1% of the time; most of those posts don't enrich my life or give me information I wanted about a product I was interested in. They're just joyless and blah.
If you can't afford to self-host your blog, then don't. This is all for fun, not for being the coolest most serious most legit blogger on the Internet. You should be able to take a break when you want to and post what you want to.
It's okay to be a small fish in a huge pond.