You don’t necessarily need merit - but what is your state of residence?
He will have loads of opportunities.
Does he want large, mid size, small?
Sports - like big time or lesser so?
In city, suburban, rural?
Most any school will be able to fill his needs - most won’t have a defined program but you’ll be able to double, minor, or take electives to meet the focus.
Good luck.
If you could spend, say $30K instead of $60K, would that matter to you? Would that open up geographic flexibility some?
Edit - missed the Small / medium.
Frankly, any school is going to have business / psych - whether one a major and minor or combo - I don’t think you need to get tricky and find a specific program. And you won’t need grad school to check both boxes.
You do need to hit budget. With a 3.8 and 30 ACT, Honors will be tougher at larger schools - like a Delaware or Uconn, etc. So stick with the smaller.
Staying the NE/Mid Atlantic, look at schools like Salisbury, Christoper Newport, and Mary Washington.
If you can stray a bit and want a mid size school but in a city, look at College of Charleston - easily accessible from the NE by non stop flight.
In the NE proper, SUNYs have been recommended. A U Maine would work and URI - you might get Honors here. But before you delve into Honors - don’t forget, all programs are different - and if the school is large, many classes will likely still be large as at many schools, Honors is a part of the experience, not the entirety. UNH isn’t too large.
There are many privates that could work including LACs - Clark University has a finance major and is strong in psych but they are going through some upheaval - but I imagine both programs will be fine. Bentley is a business focused school that would meet your needs and might make cost. St. Joes in Philly (Catholic), Marist, Bryant, Ithaca, Ramapo, Millersville, etc.
I picked my list based on you hitting budget and most, if not all, will be acceptances with the current stats. All of these schools have a finance major (not just business admin). Everyone will have econ and psych - so all bases would be covered. As you probably know, finance and econ are vastly different - one a business discipline and one a social science.
A few schools, Wagner College is one attainable in the NE, will have a formal behavioral econ degree - it fits your size and budget needs. Few schools will have formal combined programs and most that do won’t hit admissions or budget not to mention geography Arizona Eller is a great choice but it’s large and not NE It does have a fine Honors program though and Institute for Behavioral Economics.
Some schools have Business Psychology or Org Psychology -U Maine Farmington, Rider and a lot larger and out of the NE but App State and has Honors.
Hope those names help.