First I'd tell you that no one owes you an affordable answer. It costs to get in what it costs to get in.
Then I'd run you through some options that look good but are chances, not promised good.
Here's the first:
https://www.amazon.com/Sunburst-Gear...te+acoustics+a
It looks good, has 48v phantom and is built by a company that produces well reviewed, professional product. It has no reverb and I didn't look to see if it has an FX loop. Its the right price though.
Here's a second option:
http://www.ebay.com/itm/Alesis-Trans...oAAOSwI-BWPhyf
Again no reverb but its way better than a Micro cube. This I've heard and its reasonable. Closer to the AC33, with better bass than the AC33 and its $99.
Here's another option:
http://www.ebay.com/itm/K2-Energy-10...0AAOSwhQhY3iY7
With this:
https://www.harborfreight.com/automo...ter-66814.html
And something like this:
http://www.ebay.com/itm/Genuine12V-1...kAAOSwSv1Xlh~e
For plugging in this:
http://www.ebay.com/itm/Ibanez-Troub...YAAOSwX9FZGE~U
Or better, this:
http://www.ebay.com/itm/Ibanez-Troub...QAAOSwdjNZBpVU
Fourth option:
Same battery system as above and buy a used Bugera AC60 for $169 or so. Would come in at $350 and run for around 2.5 hours on battery.
http://www.ebay.com/itm/BUGERA-AC60-...IAAOSw32lYudGO
Remember that the AC33 is a $400 amp.