Raven,
If you look at my posts you will see that I run a VERY small AC unit. I have 650+ watts of PV panels and ths isn't enough to keep up. I also have 200-300 watts of wind, and this isn't much help either, as the wind rarely blows much in the summer were I live.
I would not attempt to run an inverter straight from a windturbine. The flucuations would mess with it hard. Inverters like a source that can be drawn down like a water tank. Think of it like this. You flush the john and water rushes in to refill the tank for the next flush. Your AC unit kicks on and the inverter needs to have something to draw upon. With wind that might not be there at the moment the AC unit needs it. That's where batteries come in.
I have more than one wind turbine. There is theoretically no limit to the number of turbines one can operate. RPM's have nothing to do with output. Look at DanB's latest monster. It seems to be a very low RPM machine but makes over 2K watts.
We don't know what your "stuff" is that you want to keep running, 24/7 or not. Each appliance or device states the required power to operate. Add them up to get an idea as to what you need. Look at your current power bill, it should list kilowatt hours used. That will tell you more thna we can.
There is no limit to the number of batteries one can hook together. The issue is how many one can keep charged. Batteries not being drained by an external source will go dead over time on their own. This is where your PV panels and a charge controller come in. I have a 1320 amp hour bank of batteries. I am underpowering my bank, all renewable sources combined. That's why another source, in my case an engine driving a big alternator, is needed. If I expanded my PV's or added more wind power (which I will eventually do) it would be better.
In my case if my batteries are up to around 14V and I run the AC (2500 BTU) on a bare minimum setting the batteries will be down to 11.5V in less than 6 hours. That's if the sun is shinning brightly. Once the sun sets this rate of discharge increases dramatically!
Thinking of small scale is a good idea. Since none of us know what you really want to do and how much energy you need this is the best way to learn. Nobody can assert that renewable energy is easy. However it isn't rocket science either. I would start with around 250 watts of PV's with a small charge controller, 400 amp hour battery bank, and a 500 watt inverter. I would think one could run a laptop 24/7 with this setup. However running an AC unit will require much much more power on all fronts. A big inverter, a large battery bank and some source to keep those batteries at some state of charge. Completely depleting even true deep cycle batteries is not good.
Do some more searching within this site and look at what you want to power via renewable sources. 99% of the info you need is here already.
RogerAS