There are good arguments for and against purchasing this type of insurance, and every person's situation will differ.
Even though Long-Term Care Insurance can be costly up front, it could save you from paying much more in the long run. The home care coverage that is included in the policies could possibly allow you to live independently for more time before having to switch to assisted living. Since the price of this service increases with time, if you choose to purchase it, it is much better to do so earlier than later.
If this policy is too expensive for you, it may be a better idea to apply for Medicaid. Some of these policies may not give you enough money to stay at home and will force you into assisted living if you don't have sufficient funds to support yourself and your personal help.