Just to clarify - one of you woudl need to take a year off at least , it doesn't matter which one .
And you are saying that your partner isn't willing to do it and you woudl like to but can't afford to. That's a bit of a dilemma.
And of course your partner could reduce his hours ! are you seriously saying that there is not a single part time employee in his company and the job is impossible to do part time ? I struggle to see what kind of job is done 9-5 in a building but has to be done in exactly these hours. It's not like he's on a oil rig in the North Sea .
Sorry for being so blunt, but I keep reading on MN about men's jobs that can't be flexible or part time until a woman does them and suddely everything's different .
Your DP could cut his hours / be a SAHP and you could afford it but he doesn't want to .
And you can cut your hours and you want to but you can't afford to.
Is that right ?
Of course your partner is entitled not to want to make any changes to his working life if you have a family, but that in combination with other factors does limit your options.
Honestly , I don't see how you have the time at this stage in your lives to parent two troubled children. It's a a HUGE amount of work, much much more so that bringing up two biological children .
But adoption is not for everyone and there are many other ways of becoming a family . One of them may be more right for you as a couple .
Or maybe the time is not right for you now, and at some point in the future you may be be more flexible in terms of money / career options. Lots of people save for years to be able to afford to adopt, while others change career or relocate to where houses are cheaper.
I should say that every adoption agency has its rules about which families they are prepared to assess. And every social worker has their own idea about what family will best need the needs of the child they are placing . There's no one size fits all. But I think you are very unlikely to find an agency willing to assess you for a school aged sibling group when you both work full time and neither of you is able or willing to change this.
The only exception might be a very hard to place sibling group . They might be willing to place them ( because they are desperate ) but your odds of making it work with your current set up are very slim .
I'm sorry to be so blunt and I'm sure it's not what you wanted to hear . But I'd hate for you to not explore other options that might be better suited to you and only discover this a year down the line .