a basic charge controller can grow with your system if it is sized to do so, so can an inverter.
To me, you have to decide the likelyhoods of if you will expand or not and what priorities you have. A system like mine is probably in the $8-10k range to buy outright, and I have details on some thread here on the forum. Basically, I bought a very, very good inverter as a priority that could do more than I needed at the time, I originally only had 1/2 the panels connect that it would handle, mine now has 2 charge controllers, one for 1/2 the potential panel watts each, my original charge controller is the inexpensive one, and the second one I have is MPPT. My inverter is a grid connected with batteries. My system is 48V. I also initially had less expensive batteries that stored less and had a shorter lifespan, this was upgraded later when they reached the end of life.
a similar sized ( not the same inverter etc... I have) is this, this kit is battery back up and grid intertie, 48V DC to the panels, MPTT charge controller, etc....
https://realgoods.com/the-cabin-complete-solar-pv-kit I run my whole house, including well pumps, refrigerator, etc... on this many panels. This is $9,000 and I only looked quickly, but seems that the inverter can take more panels in the future.
I realy recommend the technicians at Real Goods, call them and ask your questions, once you have thought more about it and have the questions narrowed down. They are experienced and good.
They also have very minimal, inexpensive kits like this, at $2,400 But this will supply much more limited power, due to the type of inverter. But, it is a very good system for that application. Could be they could help you come up with an inbetween solution
https://realgoods.com/the-weekender-complete-solar-pv-kit?nosto=productpage-nosto-1 This has a 1.5kWh inverter, a MPTT charge controller and is a 24V system with batteries