Don't buy cheap gear.
Do you want to be
really frustrated? Buy a budget
FRFR powered speaker. You'll be shooting yourself in the foot over and over trying to overcome these basic problems.
1. The high end driver is crispy, brittle, overdone,
If the high end driver isn't smooth you'll endlessly battle the "icepick in the ear" problem on stage and go through hell trying to dial it out without muddying up the sound.
IMHO even the JBL prx series, and Mackies from approx the last 7 years have this problem...and it's gets much, much worse with cheap gear.
2. The sonic performance drastically changes at different volumes.
The better the gear, the better it will sound at low AND high volumes, and that is critical for dialing the axe-fx. High quality
FRFR speakers make dialing for different volumes A LOT easier. Technically, no speaker sounds the same at low and high volume. And because of that it's never easy to get a guitar patch sounding good at low/high levels. If it's never easy...
why in the world make it 10 times harder just to save $200-$300 on a
FRFR speaker? You'll spend a couple grand in man-hours trying to compensate for this one fact alone, and if the high end driver isn't high quality, it'll take a lot longer.
3. Frequency separation and balance are poor.
If you wanted to paint a picture, would you close the blinds and turn on a dingy, dim yellow bulb for light, or would you get as much natural ambient sunlight as possible?
With the axe-fx you are painting a sonic picture of a killer tone inside your head. The better your "light" and the cleaner your "canvas", the more accurate the colors will be and the more you will see what you're doing. This is what a high quality
FRFR can do for you. There is no substitute for good ears and experience, but a high quality
FRFR will make the journey a lot less painful.