Carefully consider the types of solar panels you plan on having installed. Long ago, if you didn't have enough roof space, you'd need very expensive high efficiency mono-crystalline panels. There are now more advanced polycrystalline panels and even thin film panels. If you've got enough roof space, you might wish to look at the size of the panels in relation to their output capacity to avoid having insufficient panels that you need more of later.
You can be free of the power grid when you generate your own solar power. You, yourself, can get it work, making your family more independent than your neighbors. In other words, you won't need to change electric services should you move, nor will you see high electric bills anymore.
Building my first lithium-ion based 18650 Solar Power Generator in a small format for charges devices as well as drone batteries. This video (part 1) reviews the …
You should never feel pressured to buy something, especially an expensive solar energy system. These types of salespeople are pretty common in this industry. You can tell them you'll be back later, and they should be fine with it. If they are persistent about making a deal now, tell them that the deal should be just as good in the future. Making decisions under pressure can be more costly later on.