Autowatering DIY?

Hey im looking for a DIY guide or some cheap alternative to get a autowatering system. I got 2 25 gal pots and i have them outdoors. We hit 100 temps so it drys fast. Unfortunately i got to leave the place once per 2 weeks for 3 days. what can i do in order to don't let my plants dry out?

ever heard of aqua globes?? get like 8 of them bitches and put 4 in each lol http://www.amazon.com/Aqua-Globes-AG011706-Watering-2-Pack/dp/B000FHAJ90

after reading the reviews on the aqua globe and looking around this looks a little better http://www.amazon.com/Self-Watering-Probes-Package-of-5/dp/B0002VAHXC/ref=pd_sim_lg_4

I doubt anything like that would help :/ I water them about 12 gal of water daily and their dry already almost 4 hours before watering... Where could i store 72+ gal?

http://www.arizonabarrels.com/55_gallon_closed_top_blue_plastic_barrels_drums.html maybe?

Unfortunately I'm from Greece and i don't think i could find anything like this soon. Is there anything i could plug in the faucet and automaticly drain water when needed?

it says right there you can use it in anything i guess but i see that it will go faster if the res is above plant level. and evenly if below. so since these are made for 6gal pots i mean put two in each and since its going faster itll prolly be enough alls youd have to do is water the plants in the am and then fill up the barrel . but i mean your prolly right i think theres a better way perhaps a pvc system with a timer and pump?

ohh there something like that http://www.homedepot.com/Outdoors-Garden-Center-Watering-Irrigation-Sprinkler-Timers/h_d1/N-5yc1vZc63j/h_d2/Navigation?langId=-1&storeId=10051&catalogId=10053&searchNav=true

i like this one the most http://www.amazon.com/ECO1-Ambient-Light-Powered-Irrigation/dp/B00BGC80KS

Great! I will check the items in the first link you posted. I see some budget-options and probably they fit my needs. Thanks again for your time!

glad to help haha