There are three methods of resurrection in "Dragon Quest III: HD-2D Remastered Edition". The cheapest method of resurrection is to resurrect in a church. The characteristic of church resurrection is that although the cost of resurrecting team members is not particularly high, Usually around 100 gold coins, but the cost will gradually increase with each resurrection.
What are the characteristics of the Church Resurrection in Dragon Quest 3 Remake
In "Dragon Quest III HD-2D Remastered Edition", you can also choose to be resurrected in the church. There is a church in almost every town or village, and if there is no dedicated church there is usually a priest or nun somewhere who provides similar functions.
However, this costs some money. Although the cost of resurrecting a team member is not particularly high, usually around 100 gold coins, the cost will gradually increase each time you resurrect. In most cases, it is more cost-effective to use a spell to resurrect the party members and then rest in an inn to recover health and MP.
However, there are some special circumstances where your choices will be more limited. The protagonist does learn the resurrection skill, but if your MP is completely depleted and you have no items to restore, then resurrecting in a church may be your best option.
In this case, however, you will usually find a hotel nearby. If so, you can choose to rest in a hotel, which will cost less than resurrecting in a church. This will restore your MP, after which you can use spells to revive fallen party members.