Unless you’re only interested in the S-model I would suggest go check out some certified used TL’s as very little as changed over the years in those cars since the 04’s. The auto’s are generally pretty easy to find in any color/interior/feature combination you might want and the certified used ones carry a 7yr (iirc)/100k mile warranty that in most cases leaves you with more time and/or miles than the new car warranty from acura. Also you could find one in your desired payment range.
Or the step dad idea could work also 
Also keep in mind a new version is due out in the next year or two which will most likely rather drastically drop the value of the current model (as happened to the 03’s when then 04’s came out)