Not necessarily time to give up, but perhaps change focus or direction. If you have found him helpful in the past, but not so much now, then having that discussion with him as to how you can work together to achieve change (assuming you know what changes you want to make) may be the way to proceed.
Or, depending on how comfortable your relationship with your therapist is, maybe you just view this plateau as a weekly maintenance mode. A bit like treading water while you get your breath back and decide which direction to head for next. If finance is a limiting factor and it's a case of keep seeing him or no one, then use that as the impetus needed to revitalise the therapy relationship.
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