I'm sure he will be, well he should be and 2 weeks will be plenty to break his belief in the cooking, cleaning and laundry fairies if he still thinks they still exist but it's not clear whether the OPs concern is:
Am I a terrible mother for leaving my child alone to fend for himself, or
Would I be an utter fool to trust my 17 YO not to invite all his mates round to destroy my house and drink my collection of vintage single malts before throwing up on my antique rug and hiding the mess under the coffee table have parties while I'm away, or even
What if something terrible happens like a fire or the roof blows off, how will he cope?
Of the 17 YOs I know well, one would probably do the party thing and also get himself arrested, one couldn't be left because his DM still does absolutely everything for him and all attempts to grow independence have so far failed (there are some SNs but not sufficient to prevent preparation of basic meals, buying milk from the shop over the road or getting to his nearby college) and another who would behave perfectly and likely do a few minor DIYs and clean all the windows while they're away because that's how he's been brought up by his DM who was a single parent who herself is very independent and capable so he takes after her and she has made good use of the extra pair of hands available to her when decorating, moving house, building flat pack, sorting an overgrown garden etc etc.
For the last few years, he only got the privileges of Mums taxi, laundry done etc after he'd helped her put a curtain rail up or similar.