Modern films, both color and b&w, are sensitive to the full range of visible light. There is no safe light [use of two words intentional] for film. If you wish to bulk-load 35mm film, purchase a bulk film loader [I use the Watson(tm) type]. Load the bulk film into the loader in total darkness as per instructions. From that point on, you can load cassettes at will in ordinary room light. You'll get about 20-21 20-exposure rolls from 100' of bulk film. A little bit of math will show your break-even point in terms of how many rolls of film it will take to pay off the loader and cassettes.
Please note that reusable cassettes will usually be discarded by commercial film developers and will not be returned to you. Therefore, you can keep your costs to a true minimum if you a) shoot b&w and b) process your own film. You can also easily create contact 'proof' sheets of each roll. All this can be done without purchasing an enlarger.
There's a series of articles on this site which can 'walk' you through the procedures and detail the equipment you will need for film processing and the making of proof sheets. Please feel free to PM me if you have any questions about them. I have some small acquaintance with their author and can usually provide answers.