That is a much more complex topic driven by the regulations where you live. Where my house is, there is more or less no regulation and you can do as you please. In a purely technical sense there is not a lot of knowhow beyond basic electrical understanding, to setup these systems. Physically speaking these 280ah or larger battery setups are VERY heavy, hundreds of pounds per unit.
It is in a utility room with some normal fire resistant features, walls are block and the electric inverters are mounted to cement board. The batteries cells themselves are in the steel cased battery boxes which help to limit potential fire risk. Very importantly these are lithium iron phosphate NOT lithium ion. There is still some fire risk with lifepo3 batteries but it is completely different than the thermal runaway possible with lithium iron.
Do you have it in your garage or in a shed outside? I would be concerned about the fire chances.