] The Anglican parson was a gentleman and would have expected to be housed in solid comfort. Six bedrooms or so (plus servants' rooms) seems about the right size range to allow for children and visitors.

What you are saying about the Anglican parson being a gentleman and expecting to be housed in solid comfort sounds to me more like 19th century. I don't think that they could expect anything. Especially not if they were young and new. Most had to accept what was offered them.
But it might depend very much on his relation to the patron.
I beleive in most cases they just left it to the vicar to make the house habitable as best he could. Like with Steventon, wich is said to have been in not a very good state when the family moved in.

Some had money of course,to improve considerably or even build a new house, such as Rev. George Lefroy at Ashe, or Rev. George Moore at Wrotham (he was the son of the Dean of Canterbury).

It had been much worse in the early 18th century.
Let me quote from Irene Collins's Jane Austen and the Clergy:
"Parsons have often been considered luckier than other men in that they
could expect to be provided with a house rent-free to live in. Yet up to the middle of the eighteenth century this was for most of them no great blessing, since the majority of parsonage houses were humble, not to say mean dwellings,hardly better than the cottages of the poor."

Jane Austen had certainly seen a great many different parson's houses,
and she knew that they could come in all sizes and shapes.
She once said about the parsonage house at Deane that it was "like a carriage with basket and dickey". But according to Irene Collins: "even this could be considered princely,when compared with the total lack of accomodation wich persisted in some 3,000 parishes well into the nineteenth century".

I'm uncertain about what Jane might have meant, it's some time since I read MP. But guessing perhaps something like, or slightly above her own home at Steventon,wich is said to have had seven bedrooms at the first floor, and three in the attic. Or perhaps somwhat like the Ashe rectory house,wich had rooms large enough for balls.

Leif G-n