The only thing why you would benefit from getting your Pvt multi is..again..for getting time towards PIC for your MEI. However, if you're gonna pay for it now or pay for it later...doesn't really matter all that much.

Historically at Parks, if you have your MEI, you have all the multi students you could want. One of my best friends got hired with just his MEI and flew nothing but for a long time until they forced him to get the other ratings.

However, it will be different when you go through. Who knows how the industry will be when you're ready to get hired. Who knows how many flight students there will be. The biggest factor of them all is going to be whether they switch to single commercial initial by then. In the past, they always did multi commercial initial with a single engine add-on. Thats why there was so much multi to be had as an instructor. Find out if they are going to make the full switch to single commercial initial. If this is the case, DO NOT waste the money because you will get much fewer hours PIC in an add-on course.

Ok, sorry, on second thought, I change my mind. DO NOT spend the money. If you are really looking for your 15 PIC, you can take your PVT multi half way through the instrument course. That's what I would do.

Talk to SB and see what he thinks. He won't BS you.