You need to start by understanding your needs. What are you going to use the power for? Is this a year-round or seasonal application? What is your climate li

You need to start by understanding your needs. What are you going to use the power for? Is this a year-round or seasonal application? What is your climate like? Are your rooftops structurally suitable and do they face the equator? If not, what land is available, what direction does it face, and is it shade-free? Do you also have other sources of electricity; if so, what are they? Do you plan to keep/expand/get rid of them? Will your PV installation be tied into a larger electrical system (and/or the grid) or provide standalone power for specific loads? How much power will you need, and how will your usage be distributed throughout the day/year? Are permits and/or inspections required where you live? If so, which parts will you DIY vs. hire out, and what research, supplies, tools, and materials will be required to do the work in a way that will pass inspection? Once you have some answers there, you can start figuring out what kind of equipment could meet your needs and pricing it out. "I want solar!" is not a constructive way to look at anything; it's a great way to waste a bunch of money on something that will end up not giving you what you want/need. Asking here is not the way to get this done; realistically you have at least several dozen hours of research ahead of you, much more if you are off-grid or really want to do every piece of the work yourself.