Unfortunately for you, their is no easy way. It takes me 12 posts a day, plus $50 a month. Hootsuite + Ad spend.
I saw a maximum 611 Likes per post. IMHO, maybe 10 000 followers are real and active, but not all 72643.
It depends that what you want from this page. If you have your own online business, then you can use it to promote your website or if you don't have any use of this page, then it is good for you to sell this page.
If you do sell it use a service like escrowhill.com. I just used it to sell a Instagram saves getting scamed
Selling facebook pages is against their terms i thought? Anyways if the likes are real then it is worth much more than that. This niche is an evergreen one.
That depends if you sell your fb page and change its title people would not take interest on it and most probably unlike the page. Therefore decreasing the chance of it being bought. Its better to use the page to attract customers. You can use it for promoting your business or as a proof or sample that you can achieve such likes on the page in that way companies or business would need your skills and you get to earn more money.
Looking at your page, I can see the reach are pretty low. No offense, but 200 likes and 100 shares, I can get it on 10k likes page. I usually buy $10/1k likes for pages, depends on niche though. Some "high paying keyword" niche I would buy for $20/1k likes. $3500 for that page is overprice imo. I would sell it if I were you as I could make 100k likes on page running ads campaign with cost around $200-500.