Not to hear or answer any pro or cons.
But I do a lot of my cooking in the microwave. And it is yummy. That said there are somethings that are best NOT cooked in the microwave. I can make some really good casserole's and rice dishes in the micro and I heat things up. There are some things that are cooked partly in the micro and partly not, egg sandwiches are good. Eggs and sausages cook up yummy. Bacon, home or road, is cooked in the microwave. It takes some practice, but a lot of good stuff can come out. I prefer cakes breads etc. to be baked in a regular oven, but that stuff is usually just as cheap and good bought. Some veggies I like better zapped, some better roasted. I can make puddings and sauces and soups yummy in the microwave, but some I prefer slow cooked. Meatloaf can be ok, but never a chicken or steak or hunk of any kind of meat. Small chopped up chicken and ground beef in salsa works good for burritos or nachos. Mostly, just takes practice.
I have not done much with a toaster oven, I never had one. I feel it would limit what I can do. Maybe I would just need to practice, but at this stage of my cooking 'career' I'm going to stick with what I know. Maybe that should be the answer for you, just figure out what you use most now. We have a tinny BBQ my mom gave us, an induction burner and a microwave in our van. So far we have been able to do either cold dinners, sandwiches and salads when no power, and cooked goodies when we have power. But now we are looking into solar batteries for when there is no power. We had planned on the gas generator for power, but the real need for that went away for now, so we are looking in to something else.
I don't care much for propane either we had some scary things happen with those when I was a kid so I just never really liked it. I know they are better now 50 years later, but I am what I am.