So I have been advised in the past (by my attorney) to do it all out of one LLC (file d/b/a's if needed for marketing) and if you get one product that is a hit then you can isolate it from the others if you want later (but that really isn't required in most cases). But for sure, you don't need multiple LLC's just for multiple MVPs and consulting.

I maintain one LLC that I do occasional consulting out of and it also owns many of my business based investments, which includes stock and in a couple of cases units in other LLCs.