Hi OP
Are you getting relocation support and tax support from DH employer, and does it extend to you? It’s hard to tell if this is a sponsored move or requested - but to evaluate this properly you need to understand more (list below in no particular order). Devil is 100% in detail - and given you are moving for financial and tax reasons it’s critical you have proper advice and get costs and tax modelled if you are serious about this. If DH employer not paying for you to have that support, you should pay for it but also consider that they are not paying, they are not viewing him as a key person to be over there and if they restructure in the US they do it fast.
Details of package - are you supported for move out (relocation support to find accommodation, schools etc, paid for flights and moving costs). If not you need to cost all of this as priority.
Is any accommodation or schooling cost paid for, for how long
What is your estimated accommodation cost inc property taxes
What are your estimated school costs
Cost of cars and new electrical appliances
How many flights back to UK paid for each year - if not paid for, what is the cost.
What about when you leave - any support with relocation back to uk. any conditions? what about if he loses his job - do they still pay? If no support - make sure you understand costs.
Health insurance - what is the package, what are the co-pays (it doesn’t work like the UK)
What policies are in place for life assurance / death in service and critical illness . what is his notice period?
What is the pension provision and what will it be paid into (consider where you wish to retire and how much use the pension offered is / tax impact of drawing it in another country eg back in uk)
What is full package inc variable pay
What is expected US tax rate on income taking into account state and city taxes as well as federal and social.
Tax advisor needs to model your UK and US tax impact - you don’t just fall out if UK tax if you have left, rental income on property, and other uk sourced income may still be taxable here and there - what is the tax credit position and do you have double tax exposure on any items even for a period of time
If DH has existing equity awards granted while working in UK, these will be subject to uk income tax and NIC on portion earnt in UK. US payroll may also subject to federal but any double taxation shd ultimately be resolved via tax returns being filed but that takes a while - does that give you a cash flow impact? State tax will be due on equity awards even if earnt in uk.
Are you up to date on your US tax returns as a US citizen or delinquent on these? if not up to date get advice asap inc immigration input - do not want to be stopped at border.
Does DH get tax advice and tax return support? if not - find out cost of getting advice pre relocation and on ongoing basis. you and he will be filing returns in both countries (as think you said renting out property) plus state tax returns etc if relevant.
Uni costs: is it possible your kids will want to go uni, just consider that possibility and where that might be and build that into costings. You will be well behind if it might be US. For UK, just assume that you would have to pay as if foreign student and save for that if not sure will be back in time to get treated as UK student.
Hope this helps @Maryaliceyoungx
Tbh US isn’t where people are going now to max out income before retiring. So i’m surprised DH thinks it is nirvana, i do worry you are both not well informed.
US has become less popular to move to for obvious reasons (mainly safety, security esp under current administration, significant concerns re health care) and I really do think you need to think carefully about that too.