well you dont have many options,if you can afford a tray you can afford a brick of r/w its like 15 bucks for the 4x4 cubes and you get 20 of them from grodan.if you stick them into the rw you will be able to hand water until your tray comes.rw is for every one beginners or not,its really hard to screw up once your cuttings are all ready rooted. on the other hand,ijust hand water one a day and they will trive, if i was you and didnt want to use rw,i would get a shallow rubbermaid container maybe 4 inches deep by 4 ft long you can find them at wall mart.get 2 or 3 air stones one or 2 air pumps and fill the bottom of the container with hydrotont then add water and 1/4 strength nutes to your container,fill the container about a 1/2 inch above the hydroton with water and cover the root system with something,maybe take 4 ft of panda film cut out the spots for your plants and set them in the system.they will be just fine.dont leave them in there any longer than you have to though or they will root together"all bad"