But it's not kind to advise, even if indirectly, people to stay in debt longer than they need to, potentially making the situation worse. If you had included in your OP that the debt was interest free, and that you have a child, people would have probably responded differently.
No-one can say what is 'reasonable' with so little information about your circumstances, it's also not clear how comprehensive your budget is, some people miss off hundreds of pounds a month from essential costs like insurance or car repairs also planned expenditure like Christmas/holidays etc. It's also not clear whether the figures you mention is just for you and DH, or if it's for the whole family.
There also seems to be a disparity in his and your attitude for money, such that whatever you decide, make sure you have the same amount and save some of yours if you don't want to spend it, otherwise he'll likely spend most of it on his wants, if it's a joint pot.
But I wouldn't compare with others who have different priorities, life stage etc, you need to make the most of your cirumstances, have a look at the financial flow chart to make sure you're considering all current and future aspects of your financial needs, eg it would be unwise to consider money to be available for fun if you don't have much in the way of savings for a pension, emergency fund or your child's future (or if there could be more DC in the future):
The UK Personal Finance Flowchart - UKPersonalFinance Wiki