I am sad to say, but you more than likely would not be able to retrofit bass strings onto the guitar you were talking about. There are a few reasons for this:
- Tuners: Must be large enough to accept and hold the bass strings. If they are guitar tuners, they will not be compatible with bass strings so you would be looking at replacing those first which would probably come out to around $30 for a set that would stay in tune well.
- Nut: The nut has to be cut for the gauge of strings that are to be used, so obviously a standard guitar nut will not compensate for the thicker bass strings. Cutting your own nut isn't necessarily tough work, but it is easy to screw up. Depending on what type of nut you would go for it would be about $10-60.
- Bridge: This is the primary reason why I say it won't work. Acoustic basses have specific bridges on them that are routed out for the larger sized bass strings. I have owned a couple of acoustics and from dealing with them I highly doubt that you are going to be able to get a stock bridge to hold both the string and pin in order to secure it. To replace the bridge on an acoustic you would be looking at a pretty good chunk of change and some time with a good tech or luthier.
I would suggest saving your money and waiting for a bass. I know thats not what you want to hear, but it would be the best bet. There are numerous options as far as basses go and there are always great deals lingering around on Craigslist, Ebay, and many other places. Just wait and you will eventually get a bass.
By the way, good luck on your ACT.