Hosting is really the biggest up-front expense, especially if you expect to have large spikes in traffic (SaaS around events or seasonal things) that you need to try to plan for.
[0] Meaning a large cash outlay to a person. You can get away with generic privacy, TOS, etc.
The LLC is also not a total firewall. You can always raise your top by having the wrong/no insurance, but that is just making the worst outcome further negative.
I'm not saying its bad to try your own buisiness, I'm saying its silly to think your only downside is lost time. Unless you are a social pariah that no one will assist, you will have a way to risk losses and you should think about that and try to set limits that are realistic enough to stick to.