It costs about USD 1,500 the last time I checked to climb Kilimanjaro excluding transport and and accommodation before and after the climb, visa fee etc. For Mt Kenya am not sure but if you are a group you can get away with about USD 1,000 and if you modify things you can get it for a lot less.
you can climb for much cheaper !
I usually pay no more than 100$ a day all inclusive, delicious meals, stay in hut, park fees... for Mt Kenya. THat hike is feasible in 4 days. Kili is more expensive and you should expect around 1 000$.
Both hikes are very different. Mt Kenya is more alpine and a bit more physical (a bit) than Kilimandjaro but lower. The scenery is definitely better on Mt Kenya and that's where you ll make the best pictures but Kili is the highest mountain in Africa !
I m a Kenya mountain club member and we have good reliable guides contacts. Not the ones who will rip you off or put you in danger but the kind, funny and experienced ones with reasonable prices.
If you come by Yaya centre during the month, just email me before and I'll be glad to give you good tips.
Unfortunately, I'll be workin late spet, otherwise, for sue, I would have been deligthed to accompany you.
Wish you the best in Kenya and Karibu