If the family/friends are not willing to take on the job then you have little choice but to use a solicitor or just possibly a will writing firm. Or your bank - but they have a reputation for charging even more than solicitors.
And although you say 'simples', no it isn't. The way you've worded it a trust will be created on the death of the first spouse to be wound up on the death of the second. That trust may, depending how it's set up and run, require maintenance - more expense if a professional runs it.
Now that might or might not be what you've tried to describe but it sounds like it.



