you know, shalena, i label inversor as "thing i did not know existed and now i cannot live without it".
funny how DR is full of 'em
i suggest you forget the generator for now. when you own a house it may be of use but in a rented space i think it is too much of a hassle and there may not be a suitable space for it either. generator uses petrol/gasoline to produce power. it is very costly but great for emergencies as you can run it for few hours just to charge batteries. an inversor has lights that indicate what setting it is on: charging, fully charged, inverting (releasing power). it will show you when you can switch off the generator and work on batteries again.
now, for the future i suggest that you make sure your house has a utility room, directly behind the kitchen. it can be completely closed with open narrow windows for ventilation (small enough that no one can get in). why behind the kitchen and why ventilation? well, i am not a huge fan of those gas bottles. in PL we have central gas in new buildings and individual gas boilers in old ones. damn things blow up on regular basis. in my neighbourhood a drunk dude fiddled with his boiler and blew entire front wall of his apartment. and all windows in surrounding buildings. and himself, into the tree (no harm done, drunkards can survive anything). so i like to reduce danger of gas leaks. hence out gas bottle is in the utility room, connected to the kitchen with a short pipe. good ventilation helps further.
a utility room can also store water pump, water heater (that also can be connected to the gas), washing machine and dryer (ours is connected to gas bottle too). plus variety of tools and so on.
just a thought. take care