Some advice please, should I say something about spelling errors?

Here is the thing, my best friend’s boyfriend has his own business. He is on disability SS and he runs his own electronics repair business on the side. I have seen the ads he puts out, mostly via websites and they are HORRENDOUS. The spelling is so unprofessional that I wouldn’t give him a piece of electronics or my computer to fix. Just to give you an example: techs is spelled as tecs, entail is spelled as intaile, and in a recent ad where he was looking for some employees, benefits were spelled as bennfets. This goes beyond simple typos and rushing. I don’t claim to be above misspelling things, but this is ridiculous.

Normally, I wouldn’t have a problem pointing this out, but I do care about him and her. How do I bring this up nicely? How do I tell, if not him, than my best friend, how unprofessional this is making his business look?